Sanalista

use std::io::{self, BufRead};

fn main() {
    let mut lines = io::BufReader::new(io::stdin()).lines();

    let n = lines.next().unwrap().unwrap().parse().unwrap();
    let mut words = Vec::new();

    for _ in 0..n {
        words.push(lines.next().unwrap().unwrap())
    }

    let mut res = 0;

    for word in words {
        let mut chars = [0; 255];
        for b in word.bytes() {
            chars[b as usize] += 1;
        }
        if chars.iter().all(|c| *c % 2 == 0) {
            res += 1;
        }
    }

    println!("{}", res);
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED